MR !1188 : NR_gNB_initial_MIB_fix  
This MR fixes a bug for which the gNB would send an empty MIB in the first frames of execution. This is because MIB is generated every 8 frames but the first MIB wouldn't be generated before frame 8 at the beginning of each run.

MR !1184 : x2_handle_sctp_shutdown
Avoid eNB exiting after gNB tries to reconnect over X2 for NSA

This reverts commit 06a8ec98934cd9f0420f054d7ed415aa51fc3fef

This reverts commit 081a2879290d6fa806a4746f7dcfc28cc5e9c255

This reverts commit 88d7ad11a287721c8558482701077db80d2c27ae

Merge branch 'develop' of gitlab.eurecom.fr:oai/openairinterface5g into x2_handle_sctp_shutdown

Initial implementation of NR5G Standalone Access Registration procedures with CN5G.

# Conflicts:
#	cmake_targets/CMakeLists.txt
#	cmake_targets/build_oai
#	cmake_targets/tools/build_helper
#	executables/nr-gnb.c
#	openair1/PHY/INIT/nr_init_ru.c
#	openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
#	openair1/PHY/NR_TRANSPORT/nr_ulsch.c
#	openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
#	openair1/PHY/NR_UE_TRANSPORT/nr_prach.c
#	openair1/SCHED_NR/phy_procedures_nr_gNB.c
#	openair1/SCHED_NR_UE/pucch_uci_ue_nr.c
#	openair2/F1AP/f1ap_du_rrc_message_transfer.c
#	openair2/F1AP/f1ap_du_rrc_message_transfer.h
#	openair2/F1AP/f1ap_du_task.c
#	openair2/GNB_APP/gnb_app.c
#	openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c
#	openair2/LAYER2/NR_MAC_gNB/config.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_uci.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
#	openair2/LAYER2/nr_pdcp/nr_pdcp_entity.c
#	openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c
#	openair2/RRC/LTE/rrc_eNB_GTPV1U.c
#	openair2/RRC/NR/L2_nr_interface.c
#	openair2/RRC/NR/MESSAGES/asn1_msg.c
#	openair2/RRC/NR/rrc_gNB.c
#	openair2/RRC/NR/rrc_gNB_NGAP.c
#	openair2/RRC/NR_UE/rrc_UE.c
#	openair3/NAS/NR_UE/nr_nas_msg_sim.c
#	openair3/ocp-gtpu/gtp_itf.cpp
#	targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp

Integration 2021 wk25

MR !1187 : improve UE module control
* improve UE module control
* make Qlog generation optional
* add nsa tests
* update jenkins pipeline

Configure PDCP entity for UE DRB with no integrity and ciphering to comply with configuration at gNB

-To be revisited if we want to enable integrity and ciphering for DRBs

dirty fixes that fix the UL malformed packets (detected in wireshark), and also internally memory corrpution